在这份教程中,我们将会学习到如何阻止用户通过PHP上传成人照片或者裸照.
我在phpclasses.org上面偶然发现一个很有用的,由Bakr Alsharif开发的可以帮助开发者基于皮肤像素点来检测图片裸照的类文件.
它会分析在一张图片的不同部分使用的颜色,并决定其是否匹配人类皮肤颜色的色调.
作为分析的结果,他会返回一个反映图片包含裸露的可能性的分值.
此外,他还可以输出被分析的图片,上面对使用给定颜色的肤色的像素进行了标记.
当前它可以对PNG,GIF和JPEG图片进行分析.
PHP
下面展示了如何使用这个PHP类.
让我们先从包含裸体过滤器,nf.php文件开始.
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include ( 'nf.php' ); |
接下来,创建一个新的名叫ImageFilter的类,然后把它放到一个叫做$filter的变量中.
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$filter = new ImageFilter; |
获取图片的分值并将其放到一个$score变量中.
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$score = $filter -> GetScore( $_FILES [ 'img' ][ 'tmp_name' ]); |
如果图片分值大于或等于60%,那就展示一条(告警)消息.
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if ( $score >= 60){ /*Message*/ } |
下面是所有的PHP代码:
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<?php /*Include the Nudity Filter file*/ include ( 'nf.php' ); /*Create a new class called $filter*/ $filter = new ImageFilter; /*Get the score of the image*/ $score = $filter -> GetScore( $_FILES [ 'img' ][ 'tmp_name' ]); /*If the $score variable is set*/ if (isset( $score )) { /*If the image contains nudity, display image score and message. Score value if more than 60%, it is considered an adult image.*/ if ( $score >= 60) { echo "Image scored " . $score . "%, It seems that you have uploaded a nude picture." ; /*If the image doesn't contain nudity*/ } else if ( $score < 0) { echo "Congratulations, you have uploaded an non-nude image." ; } } ?> |
标记语言
我们可以使用一个基础的HTML表单上传图片.
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<form method= "post" enctype= "multipart/form-data" action= "<?<span id=" 1_nwp " style=" auto; height: auto; float: none; "><a id=" 1_nwl " href=" http: //cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=19&is_app=0&jk=d38684659f046a0d&k=php&k0=php&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=d6a049f658486d3&ssp2=1&stid=0&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F4320%2Ehtml&urlid=0" target="_blank" mpid="1" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;auto;height:auto;float:none;">php</span></a></span> echo $SERVER['PHP_SELF'];?> "> Upload image: <input type= "file" name= "<span id=" 2_nwp " style=" auto; height: auto; float: none; "><a id=" 2_nwl " href=" http: //cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=19&is_app=0&jk=d38684659f046a0d&k=img&k0=img&kdi0=0&luki=6&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=d6a049f658486d3&ssp2=1&stid=0&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F4320%2Ehtml&urlid=0" target="_blank" mpid="2" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;auto;height:auto;float:none;">img</span></a></span>" id="img" /> <input type= "submit" value= "Sumit Image" /> </form> |
总结
请记得,PHP不能够检测所有的裸体图片,所以不完全可信.我希望你觉得这还有点用处.
原文地址:http://www.rrpowered.com/2014/04/prevent-uploads-of-adult-or-nude-pictures-using-php/